Work-holding device.



A. B. NORRIS.

WORK HOLDING D EVICE.

APPLICATION FILED OCT- 17. 1914.

1,201,612. v Patented Oct. 17,1916.

5 SHEETS-SHEET I.

m: NmIRIs PETERS m. PKO70-L|1HO.. WASNINGION. n. c.

A. B. NORRIS.

WORK HOLDING DEVICE. APPLICATION FILED OCT. 11. 1914.

A. B. NORRIS.

WORK HOLDING DEVICE. APPLICATION FILED OCT. 17, 1914.

Patented Oct. 17,1916.

A B. NORRIS. WORK HOLDING DEVICE.

Patented Oct. 17,1916.

5 SHEETS-SHEET 4.

APPLICATION FILED OCT- 17- 1914.

A. B. NORRlS.

WORK HOLDING DEVICE. APPLICATION r1150 OCT. 11, 1914.

1,201,612. 1 Patented 001. 17,1916.

5 SHEETS-SHEET 5- Iil : irz iurj.

' outrun snares Parana orrion ARTHUR B. NORRIS, OFROCI-IESTER, NEW YORK,ASSIGNOR TO CHARLES E REED & 00., OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

WORK-HOLDING neuron.

Original application filed July 17, 1914, Serial No. 851,595. Dividedand this 1914. Serial No. 867,130.

To all whom it may concern Be it known that I, ARTHUR B. NORRIS, acitizen of the United States, residing at 710 Ellwanger and BarryBuilding, Rochester,

in the county of Monroe and State ofNew York, have invented new anduseful Improvements in lVork-Holding Devices, of which the following isa specification.

My invention relates more particularly to work-holding devices forsupporting, in position to be operated upon by tracer and cuttingelements, a pattern and the work to be operated on, I having devised myimprovements for use more particularly in woodworking machines forshaping the heel and toe portions of lasts, a machine of this type andthe one in connection with which I have chosen to illustrate myimprovements being illustrated and described in my pending applicationfor U. S. Letters Patent Serial No. 851,595, filed July 17, 1914, thepresent application being a division of said pending application.

My primary objects, generally stated, are to provide improvements inwork-holding devices to the end of rendering them adj ustable forreversing the ends of the work to permit the cutters to operate on bothends of the lasts without readjusting them on the holder, adjustable forvarying the throw'of the holder in reversing it, and adjustable for workof different sizes; to provide improved clamping means for securing thework against movement on the work-holder; and generally, to so improvework-holding devices as hitherto constructed that they will operate toeffectually perform. the functions intended to be performed thereby, andespecially when used for holding lasts, for. permitting the cutters toproduce lasts of the desired form and dimensions.

Referring to the accompanying drawings: Figure 1 is a view in sideelevation 'of a shaping-machine of the construction illustrated anddescribed in my said pending application for shaping the heel and toeportions of lasts, said machine being provided with work-holding devicesembodying my invention. Fig. 2 is an enlarged section taken at the line2 on Fig. l and viewed in Specification of Letters Patent.

Patented Oct. 17,1916.

the direction of the arrow, showing my improved work-holding device.inelevation with a pattern and three lasts secured in pos1ti0n thereonto cooperate with the patterntracer and cutters, respectively, onelastbe- 1ng omitted and the adjacent portion of a clamp therefor brokenaway to disclose a detail. Fig. 3. is a faceview ofa portion of one endof the work-holder. Fig. 4 is a face view of one of the adjustable barscarrying clamp-devices for the lasts and model, or pattern. Fig. 5 is asimilar view of the other adjustable bar cooperating with the bar ofFig. 1.- Fig. 6 is-a broken face view of the edge of the work-holderopposite to that shown in Fig. 3. Fig. 6 is a section taken at the line6* on'Fig. 6 and viewed in application filed October 17,

the direction of the arrow.- Fig. 7 is a section taken at the line 7 onFig. 5, and viewed in the direction of the arrow, this view showing thedetail of one of the plurality of similar devices on the work-holder,for holding the work and pattern in place. Fig. 8 is asection taken atthe line 8 on Fig. 3, and viewed in the direction of the arrow, with akey shown in elevation and in position for adjusting the bars of Figs. 1and 5 relative to each other. Fig. 9 is a section taken at the line 9 onFig. 2, and viewed in the direction of the arrow, showing thework-holder and the manner of clamping a piece of work in positionthereon. Fig. .10 is a broken sectional view taken at the line 10 onFig. 9, andviewed in the direction of the arrow. Fig. 11 is a sectiontaken at the line 11 on Fig. 10, and viewed in the direction of thearrow. Fig. 12 is a broken section taken at the line 12 on Fig. 2, andviewed in the direction of the arrow. Fig. 13 is a section taken at theline 13 on Fig. 12, and viewed in the direction of the arrow. Fig. 14:is a view partly in elevation and partly sectional of thepattern-clampingfdethe ribs 32.

the arrow. Fig. 18 is a plan view of another form of work-clamp-plate;and Fig. 19, a section taken at the line 19 on Fig. 18, and viewed inthe direction of the arrow.

In the construction of machine illustrated my improved work-holdingmeans are cartrolled by the action of hydraulic means forv positioningthe work to be operated on and the pattern in the proper positionsrelative to the cutters and pattern-tracer, respectively, and feed thework thereto by moving the Work downwardly in a direction away from thecutters and pattern-tracer. The pattern-tracer and cutters arerepresented at 24 and 25, respectively, these devices being operativelyconnected together in such manner and associatedwith other parts of themachine that the pattern-tracer is caused to automatically rotate aboutthe uppermost end of the pattern, whether it be the toe or heel portion,and produce a corresponding movement of the cutters whereby, as thework-holding slide 21 is lowered, in the operation of the machine, thecutters are caused to rotate in a path corresponding -with the path inwhich the pattern-tracer rotates, thereby causing the cutters to shapethe ends of the lasts in conformance with the shape of the end of thepattern being operated on. As the general features of this machine donot form the subject of my present application, but are clearlydisclosed in my said pending application, the foregoing generaldescription of the machine, it is believed, will suflice to render cleara manner in which my improved work-holding device may be utilized.

The preferred form of work-holder, represented at 26, is formed of aplate 27 extending across the front of the machine and provided witharms 28 at angles thereto, carrying trunnions 39 journaled in theforw'ard ends of the brackets 20. The inner face of the plate 27 isformed with converging surfaces 30, (Figs. 2 and 9), provided atintervals with transversely disposed ribs 31 and 3-2 alternating witheach other. The ribs 31 are provided in pairs arranged in staggeredover-lapping position, as shown of the' pair at the extreme left-handside in Fig. 2; in the construction shown there being three of the ribs31 and two pairs 'of At the upper and lower edges of the plate 27 Iprovide members 33 and 34 adjustable toward and away from each other onthis plate, each being formed on its rear face with lugs 35 and 36, atwhich these bars bear against the ribs 31 and 32,

respectively, and containing in its front side alongitudinally-extending channel 37 in which bars 38 and 39 areindependently slidable, straps 40 on the members 33 and 34 preventingdisplacement of the bars 38 and 39. The bars 38 and 39 contain notches41 and 42, respectively, at their adjacent ends to receive a key, suchas that represented at 43 and provided with pins 44, one of these pinscotiperating with one of these notches and the other with a slot 45 inthe channeled member containing'these bars, for adjusting the latterbars relative to each other upon rotating the key, for the purposehereinafter explained.

The members 33 and 34 are provided at intervals on their rear sides withfeet 46 carrying clamping devices 47 for securing the members 33 and 34to the plate 27 in adjusted position, these clamp-devices comprisingblocks 48 having flanges 49 which enter the end-cut portions 50 ofgrooves 51 in the ribs 31 and cap-screws 52 passing through the feet 46and screwing into the blocks 48. The ends of the members 33 and 34 areprovided with catches 53 adapted in adjusting said members, to enternotches 54 on ribs 55 on the inner faces of the arms 28. These catchesare preferably in the form of fingers 53 secured on the ends ofrock-shafts 56 journaled in the ends of the channeled bars 33 and 34 andhaving actuating levers 57, stationary plates 58 secured to the bars 33and 34 confining the fingers 53. From the foregoing description it Willbe understood that the members 33 and 34 are adjustable toward and awayfrom each other along the converging ribs 31 and 32 and are adapted tobe rigidly secured there on in adjusted position.

The bar 38 of the member 33 carries at intervals lugs 59 andbearing-blocks 60 which coiiperate with pivotally-supported devices 61and bearing-blocks 62 secured to the bar 39 of the member 33, theseparts being provided for engagement with the edges and bottom-surfacesof the toeportions of the lasts and pattern. The bar 38 of the member 34is provided at intervals with lugs 63 and the bar 39 of this member withlugs 63 the member 34 carrying bearing-blocks 64 with relation to whichthe lugs 63 and 63" are adjustable by adjusting the bars 38 and 39carrying them. The lugs 59 and devices 61 are disposed alternately andthe lugs 63 and 63 are similarly arranged, there being a pair of thebearingblocks 60 and 62 between each pair of lugs 59 and devices 61 andone bearing-block 64 between each pair of lugs 63 and 63 The lugs .59and devices 61 are adapted to gage the toe-portions of the lasts andpatterns on the work-holder with these portions of the lasts and patternbearing against the blocks 60 and 64, and the lugs 63 and 63 adapted togage the heel-portions of the lasts and pattern upon the workholder withthe bottoms of the lasts and pattern resting against the blocks 64. Thesets of lugs 63 and 63 are preferably arranged in converging position,as shown, their inner-opposed surfaces being inclined, as represented at65 and 66, to cause them to bear against those portions of the lastswhich are the most uniform. It will be understood from the foregoingthat by shifting the bars 38 and 39 lengthwise of each other in thechannel 37, as stated,'the cooperating clamping elements described arelikewise shifted adapting the work-holder for supporting lasts andpatterns of difierent widths, the above described connections of themembers 33 and 34 with the plate 27 permitting of the adjustment ofthese members toward and away from each other to accommodate lasts andpatterns of difierent lengths.

Provision of the gaging-devices on the bars 38 and 39 as described,causes each set of devices to become simultaneously adjusted uponshifting these bars, for gaging all of the lasts and pattern. Thedevices 61 are preferably each formed of a block 67 (Fig. 7) with acurved inner face, pivoted on a pin 68 carried by the bar 39 of themember 33 and pivotally connected at 69 with a toggle formed of a link70 pivoted at 71 to a crank 72 on a shaft 73 fixed in a plate 74 securedto the bar 39 and carrying a finger-grip 75 for actuating the crank 72,these parts being so arranged that when the block 67 is swung intoengagement with the edge of the last or pattern the toggle-joint 7 0will extend beyond the line connecting the points 69 and 7 3, forholding the crank 72 in place, a spring 76 operating to hold the togglein position beyond dead-center in clamping position and movable when thetoggle is thrown in the opposite direction to a position in which itdoes not oppose the last-referred to movement of the toggle.

In the drawings the pattern is represented at 77 and the lasts to beoperated on at 78 (Fig. 2), the pattern and lasts being held against thebearing-blocks 60, 62 and 64 by means of clamps 79 and 80, respectively.The clamp 79 is formed of an apertured plate 81 provided with studs 82and 83 on its rear side adapted to bear against the top of the pattern,and clamp-nuts 84 screwing upon threaded studs 85 -on the 'plate 27 atopposite sides of the pattern 77 and passing through slots 86 in theplate 81, the nuts bearing against the face of the latter. One of thestuds 85 is formed of sections pivotally connected together at 87 topermit the clamp 79 to be readily applied to clamping position. Theclamps 80, one provided for each pair of lasts 78, are each formed of aspider-plate 88 carrying and projecting outwardly from, the plate 27intermediate each pair of lasts 78 and extending through an opening 91in the plate 88, and a clamping sleeve 92 screwing upon the outerthreaded end of the stud 90. The opening 91 is preferably elongated andextends lengthwiseof the plate 88 and is provided on its outer face atopposite sides of the opening 91 with cam-surfaces 93 which are engagedby lugs 94 on the sleeve 92 and operates to force the plate 88 intorigid clamping engagement with the lasts when the sleeve 92 is turned tothe right on the stud 90, the outer end of the sleeve 92 being providedwith a head 95 equipped with wings 96 for facilitating the turning of.the sleeve. The lugs 94, head 95 and'ope'nings 91 are so proportionedthat the .lugs and head will pass therethrough upon applying the plate88 to the lasts, these lugs being spaced from the head 95 a distancegreater than the thickness of the plate 88 to avoid the necessity forremoval of this plate from the stud in preliminarily adjusting the plate88, or sleeve 92, on the stud for different sizes of lasts, the operatormerely moving the plate 88 to a position in which it will extendopposite the space between the lugs 94 and the head 95, and after thedesired adjustment of the sleeve 92 on the stud 90 has been effected,re-positioning the plate 88 beyond the lugs 94 for engagement of thelatter with the cam-surfaces 93. To prevent the plate 88 from droppingoff the stud 90 during 'reversal of the work-holder and to hold the thisspring permitting the operator to pull the plate 88 up on the sleeve 92,but preventing it from falling off the latter by its own weight; and toprevent undue rotation of the sleeve 92 on the plate 88 I provide lugs98 on the latter at opposite sides of the opening 91.

In the use of the work-holder, the pattern 77 and lasts 78 from whichthe stubs on the toe and heel portions thereof are to be removed in thecase of the particular machine illustrated, are applied to thereversible work-holder in the position shown in Fig. 8 (wherein one ofthe lasts 78 is omitted) to extend in upright position parallel to eachother, the lasts and pattern being clamped to the work-holder to rest atthe toe and heel portions thereof against the bearing-blocks 60, 62 and64, respectively, by means of the lugs 59, 63 and 63% movable blocks 67and the clamping devices 79 and 80. The operator in clamping the lastsand pattern to the work-holder may shift the members 83 and 34: towardor away from each other to cause the clamping lugs and blocks justreferred to, to engage the edges of the heel and toe portions of thelasts and pattern at the desired points, this feature adapting theworkholder to support lasts and patterns of different lengths, theprovision plate 27 with its inclined surfaces v30 operating to cause thelasts and patterns, regardless of their size, to extend medially inalinement with the trunnions on which the work-holder is mounted, inorder that the patterns and lasts, regardless of their size, shall besubstantially centrally positioned relative to the cooperatingpattern-tracer and respective rotary cutters. In the clamping operationdescribed, the operator, by using the key 43, as hereinbefore described,shifts the bars 38 and 39 in the channels 37 to adjust the'lugs andblocks carried thereby for rigidly engaging the edges of the toe andheel portions of the lasts and pattern, the clamping members of whichthe blocks 67 are parts, being swung by the operator to the positionillustrated in Fig. 7 and in the lefthand side of Fig. 3, theconstruction of these devices, as hereinbefore described, permitting ofthe firm clamping of the lasts and patterns at their edges, even shouldthey vary slightly in width. After adjusting the bars 38 and 39, asstated, the operator, by tightening set-screws 37 screwing into thechannel bars 38 and 34 and against one of the bars in the channel 37,rigidly clamps these adjustable bars in their position. The clampingdevices 79 and 80 are then applied to the pattern 77 and lasts 78,respectively, as hereinbefore described. I

As hereinbefore described, the workholder is reversible on the trunnions29 to present either ends of the lasts and pattern to the cutters andtracer respectively. Any suitable means may be employed for holding thework-holder in either of its said positions of adjustment upon itstrunnions,

' the means employed in the machine illustrated involving, generallystated, a hollow member 99 pivoted at its lower end as indicated at 100to a stationary part of the machine, a rod 101 sliding in the member 99and pivotally connected at its upper end as indicated at 102 to anextension of 103 on the work-holder, and an operating handle 104Eoperatively connected with rack and pinion mechanism, not shown, in themember 99 and interposed between the handle 104: and rod 101 andoperating upon. actuating the handle 104, as set forth in my saidpending application, to swing the workholder through approximately 180and lock it in position. The upper surfaces of the bearing-blocks 60 and62 are preferably of spherical contour, as shown in Figs. 15, 16

and 17 with the highest points located prefer'ably close to the upperends of the blocks in Fig. 3 and at the edges thereof adjacent to thelugs 59 and (37, respectively, where the blocks are cut away, as shownat 60 and 62. The shaping of these blocks, as stated, serves to causethe lasts to bear against them close to the lugs 59 and 67 and theblocks to present such bearing surfaces that the lasts,

regardless of their shapes and sizes, will seat firmly thereon.

Referring to Figs. 18 and 19, these views show a modification of thelast-clamps of the preceding figures, wherein the clamp in this case,instead of being formed as a rigid structure, is formed of two mainsections 105 and 105 with lugs for engagement with the tops of thelasts, as explained of the plates 88, the sections 105 and 105 beingpivotally connected together by a pin 106, the section 105 containing arecess 107 into which a lug 108 on the section 105 extends, the lug 108being of less width than the recess 107, whereby the rotary movement ofthe sections 105 and 105, relative to each other, is limited. Theprovision of the sectional clamps, as, described, is of great advantagewhere the lasts vary somewhat, as it causes the clamp to have afour-point contact with the last under all conditions.

While I have illustrated and described a particular embodiment of myinvention and its use in the machine of a certain construction, I do notWish to be understood as intending to limit it to such form ofconstruction or to its use in the machine illustrated, as it may be usedin other connections and its form may be variously modified and alteredwithout departing from the spirit of threaded rod, a sleeve threadedthereon,

lugs on said sleeve, a plate containing an opening adapted to be appliedto said rod and engage a piece of work, said plate extending at saidopening over said rod, and means on said plate cooperating with saidlugs, when the sleeve is rotated, to force said plate toward the work,said opening beingso shaped as to permit said plate to be withdrawn fromsaid rod over said sleeve, when said plate is rotated to register saidopening with said lugs, said sleeve belng provided with a section beyondsaid lug of such cross-section that when said plate is withdrawn fromoperative position and adjusted into registration with said section, thesaid sleeve may be rotated for adjustment without rotating said plate.

3. A work-clamping device comprising a member carrying lugs, and havingits ends beyond said lugs expanded, a plate adapted to engage a piece ofwork and containing an elongated opening of a shape and size permittingsaid member and lugs to pass therethrough in assembling said plate andmember, the portion of said member between I said lugs and said expandedend being of less cross-sectional width than the short dimension of saidopening, and the long cross-sectional dimension of said expanded portionbeing greater than the long dimension of said opening, and means on saidplate cooperating with said lugs when the latter are rotated to forcesaid plate toward the work.

4. A work-clamping device comprising a member carrying lugs, a plateadapted to engage a piece of work and containing an opening throughwhich said member extends, means on said plate cooperating with said'lugs, when the latter are turned, to force said plate toward the work,and a spring on said member beyond the plateengaging surfaces of saidlugs operating to releasably retain said plate on said member when saidplate is moved out of workclamping position into a position in which itextends beyond said surfaces of said lugs.

5. A work-clamping device comprising a threaded rod, a sleeve threadedthereon, lugs on said sleeve, a plate containing an opening, adapted tobe applied to said rod and engage a piece of work, said plate extendingat said opening over said rod, and means on said plate cooperating withsaid lugs, when the latter are rotated, to force said plate toward thework, said opening being so shaped as to permit said plate to bewithdrawn from said rod, over said sleeve, when said plate'is fotated toregister said opening with said ugs.

6. A work-clamping device comprising a threaded rod, a sleeve threadedthereon, lugs on said sleeve, a plate containing an opening, adapted tobe applied to said rod and engage a piece of work, said rod extendingthrough the opening in said plate, and means on said plate cooperatingwith said lugs, when the latter are rotated, to force said plate towardthe work.

7. A work-clamping device comprising a threaded rod, a sleeve threadedthereon, lugs on said sleeve, a plate containing an opening, adapted tobe applied to said rod and engage a piece of work, said rod extendingthrough said opening in said plate, means on said plate cooperating withsaid lugs, when the latter are rotated, to force said "late toward theWork, and a spring on said threaded sleeve operating to releasablyretain said plate on said sleeve.

8. The combination with cutting-mechanism, of work-holding meanscomprising a member, members provided with surfaces for engaging thework supported on said member, and adjustable toward and away from eachother, means operating upon ad justing said members toward each other tocause said work-engaging surfaces to move toward said cutting-mechanismand when adjusted in the opposite direction to move away from saidmechanism, and means for releasably securing thework on said firstnamedmember. 30

9. Work-holding means comprising a member having inclinedguide-surfaces, members provided with surfaces for engaging the worksupported on said guide-surfaces and adjustable toward and away from 35each other, and means for releasably securing the work on saidfirst-named member.

10. Work-holding means comprising a member having inclined convergingguidesurfaces, members provided with surfaces for engaging the Work,supported on said guide-surfaces and adjustable toward and away fromeach other, and means for releasably securing the work on saidfirstnamed member.

11. Work-holding means comprising a yoke-shaped member trunnioned at itsarms, members provided with surfaces for engaging the work, supported onsaid member within the confines of the latter, and adjustable toward andaway from each other, means operating upon adjusting said members towardeach other to cause said workengaging surfaces to move toward the axialline of said trunnions and when adjusted in the opposite direction tomove away from said line, and means forreleasably securing the work onsaid first-named member.

12. Work-holding means comprising a member, pairs of members on saidmember arranged in spaced relation and supported to be moved lengthwise,the members of each pair flatwise opposing each other in parallelrelation and relatively adjustable in parallel planes, and means carriedby said pairs of 1 members for engaging the edges of the work at theopposite ends of the latter.

13. Work -holding means comprising a member, bars supported on saidmember and adjustable toward and away from each other thereompairs ofmembers extending lengthwise of said first named member and carried bysaid bars, said pairs of members arranged in spaced relation, and themembers of each pair flatwise opposing each other in parallel relationand relatively adjustable in parallel planes, and means carried by saidpairs of 7 members for engaging the edges of the work at the oppositeends of the latter. p

.14; Work-holding means comprising a member, pairs of bars on saidmember arranged in spaced relation, the members of each pair flatwiseopposing each other in parallel relation and relatively adjustable inparallel planes, and shoulders on said pairs for clamping a plurality ofpieces of work to said member, a plurality of said shoulders beingprovided on each bar and the shoulders on one bar of each pairalternating with the shoulders on the other bar of each pair.

15. VVork-holding means comprising a member, bars secured to said memberin spaced relation and adjustable toward and away from each other, saidbars containing channels opening through corresponding faces of thebars, a pair of longitudinallyshiftable bars confined in each channelwith the bars of each pair fiatwise opposing each other in parallelrelation, and shoulders on said bars for clamping the work at itsopposite ends to said member.

16. VVork-holding means comprising a member, pairs of bars on saidmember arranged in spaced relation, the members of each pair flatwiseopposing each other in parallel relation and relatively adjustable inparallel planes, shoulders on said bars for clamping a plurality ofpieces of work to said member, a plurality of said shoulders beingprovided on each bar and the shoulders on one bar of each pairalternating with the shoulders on the other bar of each pair, andbearing surfaces on said bars between said shoulders.

17. Work-holding means comprising a member, pairs of members on saidmember arranged in spaced relation, the members of each pair beingrelatively adjustable, and shoulders on said last named members betweenwhich the work at opposite ends is clamped, the shoulders on adjacentmembers alternating, and bearing surfaces on said members extendingabove the latter between said shoulders.

18. WVork-holding means comprising a member, members on said memberadjustable relative to each other and carrying elements for clampingpieces of work to said member, the clamping elements on one of said mem'bers alternating with the clamping elements on the other of saidmembers, the clamping elements on one of said members being adjustableindependently of each other and independently of the member carryingthem.

19. In work-holding means, the combination of a member containing in aface thereof, channels spaced apart, and a pair of flatwi'se opposedbars confined in each channel to be shifted longitudinally therein inopposite directions, said bars carrying work-engaging shonlder s andcontaining key-engaging portions for shifting them. i

20. In work-holding means, the combination of amember containing in aface thereof, channels spaced apart, and a pair of fiatwise opposed barsconfined in each channel to be shifted longitudinally therein inopposite directions, said bars carrying workengaging shoulders andcontaining key-engaging notches for shifting them.

21. Vork holding means comprising a member presenting convergingsurfaces, members extending lengthwise of said firstnamed member andbearing against said converging surfaces and adjustable toward and awayfrom each other thereon, and means on said last-named members andadjustable lengthwise of the latter, for clamping the work in place.

22. VVorkholding means including a member for engaging the side of alast or pattern and a bearing-block having its upper surface roundedwith the high point on said surface closely adjacent to said member.

28. Work holding means including a member for engaging the side of alast or pattern and a bearing-block having its upper surface ofspherical contour with the high point on said surface closely adjacentto said member.

24. Work holding means including a member for engaging the side of alast or pattern and a bearing-block having its upper surface roundedwith the high point on said surface closely adjacent to said member,said bearing-block being lower at one edge than at its opposite edge.

25. Work holding means including a member for engaging the side of alast or pattern and a bearing-block having its upper surface ofspherical contour with the high point on said surface closely adjacentto said member, said bearing-block being lower at one edge than at itsopposite edge.

2.6. WVork-holding means for supporting a last to be operated on,comprising a supporting member consisting of surfaces spaced apart andbetween which a last positioned on said member extends at its heelportion, said surfaces being inclined relative to the median line of thelast and flaring outwardly in a direction away from, and at an angle to,that surface of said member opposed by the last when positioned thereon,means for engaging the last near its other end, and means for holdingthe last in position against said surfaces. s

27. A work-clamping device comprising a member carrying lugs, and havingits ends beyond said lugs expanded, a plate adapted to engage a pieceofwork and containing an elongated opening of a shape and sizepermitting saidmember and lugs to pass therethrough in assembling saidplate and member, the portion of said member between said lugs and saidexpanded end being of less cross-sectional width than the shortdimension of said opening, and the long cross-sectional dimension ofsaid expanded portion being greaterth'an' the long dimension of saidopening, a spring on said expanded poring With said lugs when the latterare rotated tion adapted to engage said plate When the to force saidplate toward the Work.

latter is adjusted to a position in which it ARTHUR B. NORRIS. surroundssaid expanded portion for releas- In presence of- 5 ably holding saidplate on said expanded RAYMOND I-I. ARNOT, portion and means on saidplate cooperat- W. EUGENE CROSBY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, 7

Washington, D. O.

